#slide {
  height: 640px;
}

.slide-item {
  background-position: top center;
  text-align: center;
}

.slide-item a {
  width: 200px;
  height: 50px;
  line-height: 50px;
  border: 1px solid #fff;
  text-align: center;
  font-size: 18px;
  color: #fff;
  display: inline-block;
  margin-top: 480px;
}